2003-11-14 17:48:57 +01:00
|
|
|
/***********************************************************
|
|
|
|
|
|
|
|
Copyright (c) 1987 X Consortium
|
|
|
|
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
|
|
in the Software without restriction, including without limitation the rights
|
|
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
|
|
|
|
The above copyright notice and this permission notice shall be included in
|
|
|
|
all copies or substantial portions of the Software.
|
|
|
|
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
|
|
X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
|
|
|
|
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
|
|
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
|
|
|
|
|
|
Except as contained in this notice, the name of the X Consortium shall not be
|
|
|
|
used in advertising or otherwise to promote the sale, use or other dealings
|
|
|
|
in this Software without prior written authorization from the X Consortium.
|
|
|
|
|
|
|
|
|
|
|
|
Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
|
|
|
|
|
|
|
|
All Rights Reserved
|
|
|
|
|
|
|
|
Permission to use, copy, modify, and distribute this software and its
|
|
|
|
documentation for any purpose and without fee is hereby granted,
|
|
|
|
provided that the above copyright notice appear in all copies and that
|
|
|
|
both that copyright notice and this permission notice appear in
|
|
|
|
supporting documentation, and that the name of Digital not be
|
|
|
|
used in advertising or publicity pertaining to distribution of the
|
|
|
|
software without specific, written prior permission.
|
|
|
|
|
|
|
|
DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
|
|
|
|
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
|
|
|
|
DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
|
|
|
|
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
|
|
|
|
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
|
|
|
|
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
|
|
|
|
SOFTWARE.
|
|
|
|
|
|
|
|
******************************************************************/
|
|
|
|
/* GJA -- modified this file for vga16 */
|
|
|
|
/* $XConsortium: mfbbresd.c /main/5 1996/02/21 17:56:34 kaleb $ */
|
|
|
|
|
2005-07-03 09:02:09 +02:00
|
|
|
#ifdef HAVE_XORG_CONFIG_H
|
|
|
|
#include <xorg-config.h>
|
|
|
|
#endif
|
|
|
|
|
2003-11-14 17:48:57 +01:00
|
|
|
#include "xf4bpp.h"
|
|
|
|
#include "OScompiler.h"
|
|
|
|
#include "mfbmap.h"
|
|
|
|
#include "mfb.h"
|
|
|
|
#include "maskbits.h"
|
|
|
|
#include "miline.h"
|
|
|
|
#include "wm3.h"
|
|
|
|
#include "xf86.h"
|
|
|
|
|
|
|
|
/* Dashed bresenham line */
|
|
|
|
|
|
|
|
#define NO_INK (-1) /* GJA -- means: dash is off */
|
|
|
|
|
|
|
|
#define StepDash\
|
|
|
|
if (!--dashRemaining) { \
|
|
|
|
if (++ dashIndex == numInDashList) \
|
|
|
|
dashIndex = 0; \
|
|
|
|
dashRemaining = pDash[dashIndex]; \
|
|
|
|
ink = fgink; \
|
|
|
|
if (dashIndex & 1) \
|
|
|
|
ink = bgink; \
|
|
|
|
if (isDoubleDash) \
|
|
|
|
WM3_SET_INK(ink); \
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
xf4bppBresD(pDrawable, fgink, bgink,
|
|
|
|
pdashIndex, pDash, numInDashList, pdashOffset, isDoubleDash,
|
|
|
|
addrlbase, nlwidth,
|
|
|
|
signdx, signdy, axis, x1, y1, e, e1, e2, len)
|
|
|
|
DrawablePtr pDrawable;
|
|
|
|
int fgink, bgink;
|
|
|
|
int *pdashIndex; /* current dash */
|
|
|
|
unsigned char *pDash; /* dash list */
|
|
|
|
int numInDashList; /* total length of dash list */
|
|
|
|
int *pdashOffset; /* offset into current dash */
|
|
|
|
int isDoubleDash;
|
|
|
|
PixelType *addrlbase; /* pointer to base of bitmap */
|
|
|
|
int nlwidth; /* width in longwords of bitmap */
|
|
|
|
int signdx, signdy; /* signs of directions */
|
|
|
|
int axis; /* major axis (Y_AXIS or X_AXIS) */
|
|
|
|
int x1, y1; /* initial point */
|
|
|
|
register int e; /* error accumulator */
|
|
|
|
register int e1; /* bresenham increments */
|
|
|
|
int e2;
|
|
|
|
int len; /* length of line */
|
|
|
|
{
|
|
|
|
IOADDRESS REGBASE =
|
|
|
|
xf86Screens[pDrawable->pScreen->myNum]->domainIOBase + 0x300;
|
|
|
|
register int yinc; /* increment to next scanline, in bytes */
|
|
|
|
register PixelType *addrl;
|
|
|
|
register int e3 = e2-e1;
|
|
|
|
register unsigned long bit;
|
2004-07-30 22:30:57 +02:00
|
|
|
PixelType leftbit = mfbGetmask(0); /* leftmost bit to process in new word */
|
|
|
|
PixelType rightbit = mfbGetmask(PPW-1); /* rightmost bit to process in new word */
|
2003-11-14 17:48:57 +01:00
|
|
|
int dashIndex;
|
|
|
|
int dashOffset;
|
|
|
|
int dashRemaining;
|
|
|
|
int ink;
|
|
|
|
|
|
|
|
fgink &= 0x0F; bgink &= 0x0F; /* GJA -- so they're != NO_INK */
|
|
|
|
|
|
|
|
dashOffset = *pdashOffset;
|
|
|
|
dashIndex = *pdashIndex;
|
|
|
|
dashRemaining = pDash[dashIndex] - dashOffset;
|
|
|
|
ink = fgink;
|
|
|
|
if (!isDoubleDash)
|
|
|
|
bgink = NO_INK;
|
|
|
|
if (dashIndex & 1)
|
|
|
|
ink = bgink;
|
|
|
|
if ( ink != NO_INK ) WM3_SET_INK(ink);
|
|
|
|
|
|
|
|
/* point to longword containing first point */
|
|
|
|
addrl = mfbScanline(addrlbase, x1, y1, nlwidth);
|
|
|
|
yinc = signdy * nlwidth;
|
|
|
|
e = e-e1; /* to make looping easier */
|
2004-07-30 22:30:57 +02:00
|
|
|
bit = mfbGetmask(x1 & PIM);
|
2003-11-14 17:48:57 +01:00
|
|
|
if (axis == X_AXIS)
|
|
|
|
{
|
|
|
|
if (signdx > 0)
|
|
|
|
{
|
|
|
|
while(len--)
|
|
|
|
{
|
|
|
|
if ( ink != NO_INK ) UPDRW(addrl,bit);
|
|
|
|
e += e1;
|
|
|
|
if (e >= 0)
|
|
|
|
{
|
|
|
|
addrl += yinc;
|
|
|
|
e += e3;
|
|
|
|
}
|
|
|
|
bit = SCRRIGHT(bit,1);
|
|
|
|
if (!bit) { bit = leftbit; addrl++; }
|
|
|
|
StepDash
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
while(len--)
|
|
|
|
{
|
|
|
|
|
|
|
|
if ( ink != NO_INK ) UPDRW(addrl,bit);
|
|
|
|
e += e1;
|
|
|
|
if (e >= 0)
|
|
|
|
{
|
|
|
|
addrl += yinc;
|
|
|
|
e += e3;
|
|
|
|
}
|
|
|
|
bit = SCRLEFT(bit,1);
|
|
|
|
if (!bit) { bit = rightbit; addrl--; }
|
|
|
|
StepDash
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} /* if X_AXIS */
|
|
|
|
else
|
|
|
|
{
|
|
|
|
if (signdx > 0)
|
|
|
|
{
|
|
|
|
while(len--)
|
|
|
|
{
|
|
|
|
if ( ink != NO_INK ) UPDRW(addrl,bit);
|
|
|
|
e += e1;
|
|
|
|
if (e >= 0)
|
|
|
|
{
|
|
|
|
bit = SCRRIGHT(bit,1);
|
|
|
|
if (!bit) { bit = leftbit; addrl++; }
|
|
|
|
e += e3;
|
|
|
|
}
|
|
|
|
addrl += yinc;
|
|
|
|
StepDash
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
while(len--)
|
|
|
|
{
|
|
|
|
|
|
|
|
if ( ink != NO_INK ) UPDRW(addrl,bit);
|
|
|
|
e += e1;
|
|
|
|
if (e >= 0)
|
|
|
|
{
|
|
|
|
bit = SCRLEFT(bit,1);
|
|
|
|
if (!bit) { bit = rightbit; addrl--; }
|
|
|
|
e += e3;
|
|
|
|
}
|
|
|
|
addrl += yinc;
|
|
|
|
StepDash
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} /* else Y_AXIS */
|
|
|
|
*pdashIndex = dashIndex;
|
|
|
|
*pdashOffset = pDash[dashIndex] - dashRemaining;
|
|
|
|
}
|